实体框架查询中的多个包含

// 定义实体类
public class Order
{
    public int OrderId { get; set; }
    public string OrderNumber { get; set; }
    public List<Product> Products { get; set; }
}

public class Product
{
    public int ProductId { get; set; }
    public string ProductName { get; set; }
}

// 查询订单及其包含的产品信息
using (var context = new YourDbContext())
{
    var order = context.Orders.Include(o => o.Products).FirstOrDefault();
    if (order != null)
    {
        Console.WriteLine("订单号：" + order.OrderNumber);
        Console.WriteLine("包含的产品：");
        foreach (var product in order.Products)
        {
            Console.WriteLine(product.ProductName);
        }
    }
}